HS Code for Lye

Lye, scientifically known as sodium hydroxide or caustic soda, is classified under HS code 2815.11 when it is in its solid form. This classification falls within Chapter 28 of the Harmonized System, which covers inorganic chemicals, precious metals, and rare-earth metals. Specifically, heading 2815 is reserved for sodium hydroxide, potassium hydroxide, and peroxides of sodium or potassium. The subheading 2815.11 is strictly for the solid state of sodium hydroxide, which includes forms such as pellets, flakes, or lumps. To be classified here, the product must be a chemically defined compound of high purity, typically resulting from the electrolysis of sodium chloride solutions. The classification is determined by the physical state of the chemical at room temperature and its chemical composition as a base alkali. If the product is dissolved in water, it shifts to a different subheading, making the distinction between solid and liquid forms critical for customs compliance and duty rate determination.

Products Included

• Sodium hydroxide pellets
• Caustic soda flakes
• Anhydrous sodium hydroxide
• Solid lye for soap making
• Technical grade sodium hydroxide in granular form

Common Misclassification

The most frequent misclassification occurs with HS code 2815.12, which is designated for sodium hydroxide in aqueous solution (soda lye or liquid soda). Importers often confuse the two based on the common name 'lye,' but the physical state (solid vs. liquid) dictates the 6-digit subheading. Additionally, lye mixed with other cleaning agents may be misclassified under 3402 as a detergent or 3824 as a chemical preparation, but pure sodium hydroxide must remain in 2815.11.

FAQ

What is the HS code for Lye?

The HS code for solid lye (sodium hydroxide) is 2815.11. If the lye is in a liquid solution, the correct code is 2815.12.

Does the purity of the lye affect its HS code?

Generally, no. As long as it is sodium hydroxide in solid form and not mixed with other functional chemicals that change its character into a preparation, it remains under 2815.11 regardless of whether it is technical or food grade.